Definitely recommend it if you have more than one system were having a lot of water to check on a daily basis will definitely save your time Plus aquacave had the best price around then their competitors like bulk Reef Supply definitely keep buying supplies from aquacave if their prices stay lower than their competitors (Posted on 3/7/2017)

A must have Review by Tim

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this thing is great so much easier to read than the scale on the refractometer and a whole lot faster to use (Posted on 6/9/2015)

Very important item Review by michelle

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I am very pleased with this product makes testing your salinity in reef tank so much easier wish I would have bought this year's ago! Can't believe how nice it is its AMAZING!
☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆ (Posted on 12/20/2014)

Recommend to buy. Review by Jonathan

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This thing is great. Very easy to use right out of the box. Use the distilled water or you own RODI water to calibrate before use. Press one button to calibrate. Grab a sample of your salt water. Press one button to test. That is it. I would also recommend to buy this combo with the case as this is a pricey device and the main instrument is very much exposed. (Posted on 8/17/2014)